제주산 참다래가 Loperamide로 유도된 변비에 미치는 영향 = Effects of the Actindia chinensis on Loperamide-induced Constipation in Rat

다국어 초록 (Multilingual Abstract)

Loperamide-induced constipation reduced gastric emptying, small-intestinal and colonic motility, and these effects were prevented by Actindia chinensis(Gold Kiwi Fruit, GKF). In this study, the effects of Actindia chinensis on constipated male Sprague-Dawley rats induced by loperamide(2 mg/kg, s.c.,5 days) were investigated. Rats were randomly assigned to the normal control rats(regular diet), constipated rats(regular diet plus loperamide), constipated rats treated with 2.5% GKF(regular diet supplemented with 2.5% GKF plus loperamide), constipated rats treated with 5% GKF (regular diet supplemented with 5% GKF plus loperamide). There was less fecal excretion and lower fecal water content in loperamide-treated rats than in control rats. Oral administration of GKF blocked the decrease of fecal excretion and fecal water content in the loperamide-treated rats. Mucus production of crypt cell and mucus contents at fecal and mucosa surface were reduced by loperamide-treated rat. But colonic crypt cell contained increased mucin in the GKF treated group and mucus layer stained with alcian blue was significantly thicker in GKF treated rats compared with in loperamide-treated rats. In isolated rat ileum, loperamide produced inhibition of ileal motility. Pretreatment with methanolic extracts of GKF in isolated rat ileum prevented inhibition by loperamide. These findings indicated that the GKF was effective for alleviation of inhibition of colonic peristalsis by loperamide and that GKF might be of value in the prevention of constipation.

국문 초록 (Abstract)

참다래 동결건조물을 2.5%, 5% 농도로 사료와 혼합하여 실험동물에 투여하고 실험 5일간 loperamide(2 mg/kg/ day, s.c.)로 변비를 유도하여 참다래의 변비치료 및 예방효과를 측정하였다. Lopermide를 단독 투여한 군은 정상 대조군과 비교하여 변의 개수 및 중량이 유의적으로 감소하였으며 원위 결장 내 변 잔류의 증가 및 cecocolonic segment의 무게가 증가하였다. 참다래 동결건조물 및 loperamide를 투여한 군은 loperamide를 단독 투여한 군과 비교하여 변의 개수 및 중량이 유의적으로 증가하였으며 원위 결장 내 잔류 변 및 cecocolonic segment의 무게도 감소하였다. 이러한 결과는 참다래가 in vivo에서 변비 개선 효과가 있음을 보여준다. 변의 수분 함량에서도 loperamide로 변비를 유발시킨 군에서 감소하는 경향을 보였고 참다래 동결건조물 투여군에서 농도 의존적으로 증가하는 것을 확인 할 수 있었다. 조직학적 검사에서도 참다래 동결건조물 투여군의 원위 대장관에서 crypt cell내 점액의 증가와 장관내 분변의 점액질의 증가도 관찰되었다. In vitro 실험결과, 회장 적출 절편에서 참다래 동결건조물 (2.5 mg/ml)을 전 처리 시 loperamide에 의한 장력과 진폭 억제가 부분적으로 차단되었으며 이러한 결과는 참다래 동결건조물의 변비 개선효과가 장의 운동성 촉진과 대장관내 점액분비 증가에 의한 대장관 내용물의 이동성증가와 관련이 있음을 시사한다.

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